Things changing at the drop of hat was a huge change a step an athlete as well. My coach always started the year by telling us to tell our parents not to contact him, because "you're an adult now and need to take care of your own problems." He honestly made us all have to step up a lot. Mat list is one of the craziest things to get used to. We had a mat list posted on our team groupme after each workweek, camp, and about once a month until choreography on the first weekend in January. He always said that he posted it and it's who would be competing in mat if they left tomorrow. The anxiety of the last one before choreo was crazy. Of course the occasional person may get switched out second semester but that one that was posted 2-3 days before choreo was the most terrifying.